I was looking into some third-party code, upgrading it from Silverlight 4.x and was getting error ‘The member "Content" is not recognized or is not accessible’ at the following code part: Looking it up, found that you don’t need to bind the Content property of a ContentPresenter at all if you put it inside the […]

Was just debugging an issue with loading of saved state at ClipFlair’s Text component, when I realized that Silverlight’s (and WPF’s) RichTextBox control doesn’t accept an empty string at its Xaml proprerty to clear its contents as one would expect. Instead clearing the contents of the RichTextBox requires a call to Blocks.Clear(). In ClipFlair’s ...

While refactoring ClipFlair code to use MVVM (Model-View-ViewModel) pattern, I came across the XAML error “Object reference not set to an instance of an object.”, shown in Visual Studio when trying to bind to my ViewModel (accessed implicitly, being set as the DataContext of the XAML control) for a property named Source. I have settled [...]

Just came accross a runtime error message that troubled me a bit to resolve while adding Prezi-like content scaling functionality in ClipFlair‘s FloatingWindowHostZUI (ZUI = Zoomable User Interface) container. I had added the following: /// Identifies the <see cref="FloatingWindow.Scale" /> dependency property. /// ...

If you use TimeUpDown control from Silverlight Toolkit in your XAML like below (copy pasting from CaptionGrid at ClipFlair source): <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" > <DataTemplate ...

Following up on a note about Visual Studio 2010 crashing at my previous post, this is the XAML that crashes VS2010 when opened up in a Silverlight project: <UserControl x:Class="SilverlightApplication1.MainPage"   xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"   ...

While adding some properties to the back panels of ClipFlair windows, I came upon the issue of how to space items in a StackPanel. A Padding property is missing from multiple item containers (only single content controls have such), but a nice solution is described at: ...

I just had some big trouble troubleshooting the Visual Studio / XAML compiler error message: The tag XXX does not exist in XML namespace ‘clr-namespace:YYY’ It turned out this occurred because I had a Silverlight library with Assembly name X and default namespace X (at properties pane), but was using it from a demo project [...]

Copying here my answer at: http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/11a42336-8d87-4656-91a3-275413d3cc19 What seems to work for me is the following (copying from the source code of http://ClipFlair.codeplex.com [currently under development]) note I’m using Build Action = "Page" and Custom ...

The other day I submitted my 1st Windows Phone 7 application via http://create.msdn.com Having registered for free as a student developer (being a PhD student on Robotics) via http://dreamspark.com I could only try my 1st app on WP7 emulator – when it gets accepted I will be able to have my WP7 phone unlocked to [...]